<!DOCTYPE html>

<html lang="zh-CN">
<head>

    <meta charset="utf-8">

    <meta http-equiv="X-UA-Compatible" content="IE=edge">

    <meta name="viewport" content="width=device-width, initial-scale=1">

    <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->

    <title>Bootstrap 101 Template</title>

    <!-- Bootstrap -->

    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">

    <style>

    .demo {

        border: 1px red solid;

        border-radius: 3px;

        margin: 10px 0;

    }

    </style>

</head>



<body>

    <div class="container">

        <h1>你好，世界！</h1>

        <div class="row">

            <div class="col-md-8 demo">.col-md-8</div>

            <div class="col-md-4 demo ">.col-md-4</div>

        </div>

        <div class="row">

            <div class="col-md-3 demo">3</div>

            <div class="col-md-6 demo ">6</div>

            <div class="col-md-3 demo ">3</div>

        </div>

        <div class="row">

            <div class="col-md-6 demo">.col-md-6</div>

            <div class="col-md-6 demo ">.col-md-6</div>

            <div class="col-md-12 demo ">.col-md-6</div>

        </div>

        <div class="row">

            <div class="col-md-6 demo">

                <div class="row">

                    <div class="col-md-3 demo"><img src="https://img.alicdn.com/i2/2/TB1lL6xPVXXXXcTXpXXSutbFXXX.jpg_100x150q100.jpg" alt=""></div>

                    <div class="col-md-3 demo"><img src="https://img.alicdn.com/i2/2/TB1lL6xPVXXXXcTXpXXSutbFXXX.jpg_100x150q100.jpg" alt=""></div>

                    <div class="col-md-3 demo"><img src="https://img.alicdn.com/i2/2/TB1lL6xPVXXXXcTXpXXSutbFXXX.jpg_100x150q100.jpg" alt=""></div>

                    <div class="col-md-3 demo"><img src="https://img.alicdn.com/i2/2/TB1lL6xPVXXXXcTXpXXSutbFXXX.jpg_100x150q100.jpg" alt=""></div>

                </div>

            </div>

            <div class="col-md-6 demo ">.col-md-4</div>

        </div>

        <div class="row">

            <div class="col-md-6 col-md-offset-3">

                <form class="form-horizontal">

                    <div class="form-group">

                        <label for="inputEmail3" class="col-sm-2 control-label">Email</label>

                        <div class="col-sm-10">

                            <input type="email" class="form-control" id="inputEmail3" placeholder="Email">

                        </div>

                    </div>

                    <div class="form-group">

                        <label for="inputPassword3" class="col-sm-2 control-label">Password</label>

                        <div class="col-sm-10">

                            <input type="password" class="form-control" id="inputPassword3" placeholder="Password">

                        </div>

                    </div>

                    <div class="form-group">

                        <div class="col-sm-offset-2 col-sm-10">

                            <div class="checkbox">

                                <label>

                                    <input type="checkbox"> Remember me

                                </label>

                            </div>

                        </div>

                    </div>

                    <div class="form-group">

                        <div class="col-sm-offset-2 col-sm-10">

                            <button type="submit" class="btn btn-default">Sign in</button>

                        </div>

                    </div>

                </form>

            </div>

        </div>

    </div>

    <!-- jQuery (Bootstrap 的所有 JavaScript 插件都依赖 jQuery，所以必须放在前边) -->

    <script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script>

    <!-- 加载 Bootstrap 的所有 JavaScript 插件。你也可以根据需要只加载单个插件。 -->

    <script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

</body>

</html>

